Oil burner



Nov. 3, 1931. H. BARLEY OIL BURNER Filed July 17, 1930 2 Sheets-Shet 1INVENTOR.

HARRY BARLEY BY ATTORNEY.

H. BARLEY OOO OOOO ER lWl/ll m joints the hi h spee amiss Nov. 3, i931PATENT QFFICE BABLEY, OF SAN- FRANCISOO, CALHOBRIA on. Bum

Application filed July 17,1980. Serial Ho. 488,519.

This invention relates to improvements 111 oil burners and moreparticularly to motor driven oil burners.

Among-the objects of the inventlon is to so a combine and arrange theoil ressure and motor system that external lea age of 011 IS avoided inthe burner feed system.

Another object is to eliminate compression stufling boxes and glandswhere the 011 feed d shaft of the centrlfugal fan for mec amcallyvaporizing the fuel.

A further object is to insure an initial feed of fuel oil when the motorstarts and to maintain a constant and uniform presure on the oil fueladjacent the burner. Other objects and advantages will appear as thedescription progresses.

In this specification and the accompanying drawings the invention isdisclosed in its preferred form. But it is to be understood that it isnot limited to this form, because 1t ma be embodied in other forms. Itis also to e understood that in and by the claims following thedescription it is desired to cover 2 the invention in whatsoever form itmay be embodied.

In the two sheets of drawings:

Fig. 1 is a side elevation, part1 in cross section, of an oil burnerhaving t s invention combined therewith, diagrammatically illustratingthe supplementary fuel pressure system.

Fig. 2 is an enlarged side elevation, partly in vertical section, of theshaft packing assembly.

Fig. 3 is a further enlarged fragmentary detail showing in verticalsection the helical fuel return groove in the packing gland of the motorshaft. y

In detail the construction illustrated in the drawings comprises thefurnace front 1,

which will vary in difl'erent installations.

In general construction the oil burner comprises a tight housing 2,having the hollow shaft 3, mounted therein in suitable bearings. Thisshaft may be the armature shaft of a direct connected motor within thehousing, for driving the shaft-at high speed.

An oil pump 4 pumps fuel oil through the needleva ve opening 5 andthrough the shaft 3, from whence it issues through suitable holes intothe atomizin tip 7. I The fan housing 8 orms a art of the housing 2. Asuitable fan is xed on the shaft 3 and revolves at high speed within thehousin 8. This fan has a hollow hub throng which the fan creates asuction through the housing 2, at the intake 13. A butterfi valve 14 isinstalled in the intake 13 to regu ate the volume of air admitted at 13.

he air drawn through the housin 2 cools m I the motor and carries awayany oil fumes originating in the housing 2.

The air blast created by the fan escapes from the fan housing 8 into theair nozzle 15 and is blown out as a forcible armular jet at 16, betweenthe oil atomizer 7 and the air nozzle 15. This jet picks off theatomized oil issuing from the atomizer and expands I it into a gaseousvapor, which expands laterally into a vortex flame when ignited andcombustion is supported by proper admission of ventilation into thefurnace, in the usual manner.

For further particulars re arding the fuel oil burner see my Patentumber 1,655,083 dated January 3, 1928. I

This invention relates particularly to the juncture of the hollow shaft3 with the fuel oil coupling 20, see Fig. 2. This couplin is flanged andbolted to the housing 2. It has v an inner chamber 21, communicatingwith the end of the shaft 3. The fuel oil is led into this chamber thruthe opening 5 and controlled manually by a suitable needle valve. 35

.The neck 23 is concentric with the shaft 3 and is bored to accuratelyfit the shaft 3. The plug 24 is alined with the shaft and provides meansfor clearin the same of any obstructions that may 10 go therein.

of this class.

The inner end of the neck 23 is counterbored to receive the felt orsimilar washer 25, protected by the knurled nut 26 screwed onto the neck23. It is not intended to compress the'washer to any considerableextent. It

is not a compression packing in the usual sense, but merely a capillarybafiie to stop the oil seeps e by gravitation at this point.

Because 0% the relatively high s eed of the shaft 3, it is undesirableto pee it at the int 25 with compression or similar stufiing E xes,which exert an undue frictional retard, tend to cut the shaft and throwit out of alinement and at best have a low efliciency even whencarefully adjusted atfrequent intervals By the present invention a highpackin efliciency and other advantages are attains with minimalattention.

Besides the waste and unmechanical effect of leakage at-this int; it isa fire hazard with the types of Practice has proved a spiral groove orhelix 27 internally cut in the neck 23 in the direction contrary to thedirection of rotation of the shaft 3, will pump the film of oil withinthe neck in contact with the shaft 3, back toward the chamber 21, evenin the annular washer 25, and t e inner end in the chamber a ainstaconsiderable head ress within this 0 amber. The obvious resu t is, noleakage past the washer 25.

The'outer end of'this helix 27 terminates oove 28, adjacent the felt'21; r The displac' or pumping action of the helical groove is furtherutilized in startin up the burner, see Fig. 1. The pressure tig t tank30 of about one allon capacity is connected at 31 to the disc arge lineof the pump .4 and at 33 to the suction side of the pump or to the fueltank (not shown).

The discharge 33 has the spring relief valve 34 therein set at about tenpounds to maintain that pressure on the tank 30. This tank is connectedby the pipe 35 with a bypass 36, leading to the helical groove 27 nearits outer end. The shut-off cock 37 and the automatic electricallyoperated valve 38 are interposed in the pipe 35 to control the flowtherethrough in accordance with the legal regulations relating thereto.

When the motor is started there is an interval before the pump 4, drivenby the motor shaft 3, picks up its load and delivers fuel to the chamber21. In the meantime the burner is in operation, but not igniting orfunctioning for lack of fuel.

This disadvantage is overcome by the fuel in the auxiliary tank 30,flowing to the helical groove,.from whence it is driven by therotation'of the shaft 3, into the chamber 21 and from thence through thehollow shaft 3 to the burner, simultaneously with the starting els inuse with burners of the motor, and previous to the pump 4 operating tocapacity.

The capacit operation of the ump puts the tank 30 between the valves34-38 until the motor starts a sin. The manual valve 37 ma also be closeto stop the feed from the tan 30.

; It is advantageous, es cially with automatic. iiitiomto have elpresent in the burner capacity R. P. M.

It has been proved practicethat this helical groove and rotary shaftcombination acts as a pump" capabl (if-exerting a r35- The ressurerisesorifa "according to the sure of 25 pounds per nare inch on gravitof the fuel bein -pumped. 1 7

Sue a pump will supply several quarts of fuel an hour suflicientfto'supply a small burner on a fuel supply system such as the auxiliary tanksystem "by increasing the capacity of the tank or drawing from a sourceof sufiicient ca acit Having thus descri d t is invention what I claimand desire to secure by letters patent 1. In combination with a rotaryoil burner having a hollow shaft; a fuel connection to the open end ofsaid shaft and having a neck encircling said shaft having a helicagroove therein encirclin said shaft in a direction posite to theirection of rotation of'said opposite to the direction of rotation ofsaid s 1 aft and terminating in an annular groove; an absorbent packingencircling said shaft adjacent said annular groove; and a bypass fuelconnection through said neck communicatin with said helical grooveintermediate its an s ;and an auxiliary fuel tank connected with saidbypass and a fuel supply. I

fore the motor and pump attain 3. In combination with a rotary oilburner having a hollow shaft; a fuel connection on circling said shaftand having an internal helical roove encircling said shaft contrawise tot c direction of rotation of said shaft; a pump having a dischargeconnected with said fuel connection and said helical roove.

4. In combination with a rotary oil urner having a hollow shaft; a fuelconnection encircling said shaft and having an internal circling saidshaft and having open to said hollow shaft and a helical groove.

helical oove encircling said shaft contrawise to t e direction ofrotation of said shaft a fuel line pump connected with said fuelconnection; and an auxiliary fuel supply connected with said helical veh5. In combination with a rotary oil burner having a hollow shaft; a fuelconnection on a chamber encircling said shaft and discharging into saidchamber; a fuel line connected to said chamber; an auxiliary fuel supplcomprising a pressure tank connected wit said fuel line and said helicalgroove. In testimony whereof I have hereunto set my hand this 9th day ofJul 1980.

HARR BARLEY.

